Q2 2018Q1 2018Q4 2017Q3 2017Q2 2017
Same-store sales growth-6.0%-10.3%-10.8%-7.7%-5.2%
Same-store transaction growth-11.1%10.4%-15.5%-6.7%-8.6%
Same-store avg check growth-5.1%-20.7%4.7%-1.0%3.4%

Notes:Same-store sales, referred to by the company as "comparable restaurant sales," includes sales from restaurants open at least 18 months